Heather Quelch was named head of pensions administration at TPT Retirement Solutions, London, a spokeswoman said.
Ms. Quelch replaced Andrew Marson, who left TPT earlier this year, the spokeswoman said. Additional details of Mr. Marson's plans could not be learned.
Ms. Quelch is responsible for administration and client servicing.
"(Ms. Quelch's) knowledge and experience will help us continue to improve our services in this area," CEO Mike Ramsey said in a news release. "Administration and client servicing are also important considerations for schemes looking to join TPT."
Ms. Quelch previously worked as an administration director at Jardine Lloyd Thompson Group. A spokeswoman could not be reached to comment about a replacement.
TPT has £9 billion ($11.6 billion) in assets.